AC Inverter Unit Input Test (2020 2021 2022 2023)

NOTE: Before testing, make sure the fuses associated with the system is OK.

1. Turn the vehicle to the OFF (LOCK) mode.

2. Disconnect the AC inverter unit connectors.

AC INVERTER UNIT CONNECTOR A (2P) (female terminals)

Courtesy of HONDA, U.S.A., INC.

AC INVERTER UNIT CONNECTOR B (10P) (female terminals)

Courtesy of HONDA, U.S.A., INC.

Inspect the connector and socket terminals to be sure they are all making good contact:

If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

With the connector still disconnected, do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, go to step 5.

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A2	RED	Vehicle ACCESSORY or ON mode	Connect terminal No. B7 to ground with jumper wire, and measure the voltage between terminal No. A2 and ground:There should be battery voltage.	An open or high resistance in the wire Faulty AC inverter relay Faulty AC inverter ACC relay
B7	RED	Vehicle ACCESSORY or ON mode

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
B1	BLU	Vehicle ACCESSORY or ON mode, and AC power outlet switch pressed	Measure the voltage to ground: There should be battery voltage.	An open or high resistance in the ground wire Faulty AC power outlet switch Faulty AC inverter ACC relay
B7	RED	Disconnect the under-dash fuse/relay box connector N (20P), and remove the AC inverter relay	Check for continuity to ground:There should be no continuity.	A short to ground in the wire
B6	BLK	Disconnect the under-dash fuse/relay box connector D (44P)	Check for continuity between terminal No. B6 and under-dash fuse/relay box connector D (44P) terminal No. 40:There should be continuity.	An open or high resistance in the wire

Reconnect the connectors, and do the following input tests:

If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the AC inverter unit .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
A1	BLK	Under all conditions	Measure the voltage to ground:There should be less than 0.2 V.	Poor ground (G605) An open or high resistance in the ground wire